package com.ruoyi.common.core.utils;

import com.github.pagehelper.PageHelper;
import com.ruoyi.common.core.utils.sql.SqlUtil;
import com.ruoyi.common.core.web.page.PageDomain;
import com.ruoyi.common.core.web.page.TableSupport;

/**
 * 分页工具类
 *
 * @author ruoyi
 */
public class PageUtils extends PageHelper {
  /** 设置请求分页数据 */
  public static void startPage() {
    PageDomain pageDomain = TableSupport.buildPageRequest();
    Integer pageNum = pageDomain.getPageNum();
    Integer pageSize = pageDomain.getPageSize();
    if (StringUtils.isNotNull(pageNum) && StringUtils.isNotNull(pageSize)) {
      String orderBy = SqlUtil.escapeOrderBySql(pageDomain.getOrderBy());
      Boolean reasonable = pageDomain.getReasonable();
      PageHelper.startPage(pageNum, pageSize, orderBy).setReasonable(reasonable);
    }
  }

  /** 清理分页的线程变量 */
  public static void clearPage() {
    PageHelper.clearPage();
  }
}
